ISL8012(2008) Просмотр технического описания (PDF) - Intersil
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ISL8012 Datasheet PDF : 15 Pages
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ISL8012
Typical Operating Performance (Unless otherwise noted, operating conditions are: TA = +25°C, VVIN = 2.5V to 5.5V, EN = VIN,
MODE = 0V, L = 1.5µH, C1 = 2x10µF, C2 = 2x10µF, IOUT = 0A to 2A).
100
100
90
90
80
1.5VOUT
70
1.2VOUT
60
80
70
1.5VOUT
1.8VOUT
1.2VOUT
2.5VOUT
60
50
50
40
2.5VOUT
40
30
20
0.00
1.8VOUT
0.25 0.50
0.75
1.00
1.25
1.50
1.75
2.00
OUTPUT LOAD (A)
FIGURE 3. EFFICIENCY vs LOAD (1MHz 3.3VIN PWM)
30
20
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
OUTPUT LOAD (A)
FIGURE 4. EFFICIENCY vs LOAD (1MHz 3.3VIN PFM)
100
90
80
70
1.5VOUT 1.2VOUT 1.8VOUT 2.5VOUT
60
50
40
30
3.3VOUT
20
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD (1MHz 5VIN PWM)
100
90
80
70
1.5VOUT
1.8VOUT 2.5VOUT 3.3VOUT
60
1.2VOUT
50
40
30
20
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY vs LOAD (1MHz 5VIN PFM)
1.000
0.875
0.750
3.3VIN PWM
0.625
0.500
0.375
0.250
0.125
5VIN PWM
5VIN PFM
3.3VIN PFM
0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
OUTPUT LOAD (A)
FIGURE 7. POWER DISSIPATION vs LOAD (1MHz, VOUT = 1.8V)
160
140
120
100
80
PWM MODE
60
40
20
02.0 2.5
3.0 3.5
4.0 4.5
5.0 5.5
6.0
VIN (V)
FIGURE 8. POWER DISSIPATION WITH NO LOAD vs VIN
(PWM VOUT = 1.8V)
7
FN6616.0
March 11, 2008
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